:root {
  /* Color Palette - Dark Theme (Default) */
  --bg-primary: #0a0d14;
  --bg-secondary: #0f1523;
  --bg-tertiary: #161f33;
  --bg-card: rgba(16, 24, 40, 0.7);
  --bg-card-hover: rgba(22, 33, 56, 0.85);
  --bg-glass: rgba(15, 23, 42, 0.65);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(99, 102, 241, 0.3);
  --border-accent: rgba(6, 182, 212, 0.4);

  /* Brand Accents */
  --brand-primary: #6366f1; /* Electric Indigo */
  --brand-cyan: #06b6d4;    /* Cyber Cyan */
  --brand-purple: #8b5cf6;  /* Deep Violet */
  --brand-emerald: #10b981; /* Cardano / AI Success Green */
  --brand-cardano: #0033ad; /* Cardano Blue */
  --brand-cardano-bright: #2a73ff;

  /* Gradients */
  --gradient-ai: linear-gradient(135deg, #06b6d4 0%, #6366f1 50%, #a855f7 100%);
  --gradient-cardano: linear-gradient(135deg, #2a73ff 0%, #06b6d4 100%);
  --gradient-java: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
  --gradient-surface: linear-gradient(180deg, rgba(255, 255, 255, 0.04) 0%, rgba(255, 255, 255, 0.01) 100%);
  --gradient-hero-glow: radial-gradient(circle at 50% 20%, rgba(99, 102, 241, 0.15), transparent 70%);

  /* Text & Typography */
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-accent: #38bdf8;

  /* Shadows & Depth */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 25px rgba(99, 102, 241, 0.25);
  --shadow-cyan-glow: 0 0 25px rgba(6, 182, 212, 0.25);

  /* Fonts */
  --font-heading: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Layout */
  --max-width: 1240px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --transition-fast: 0.18s ease;
  --transition-base: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.5s cubic-bezier(0.16, 1, 0.3, 1);

  color-scheme: dark;
}

/* Light Theme Overrides */
[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #f1f5f9;
  --bg-tertiary: #e2e8f0;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-card-hover: rgba(255, 255, 255, 0.98);
  --bg-glass: rgba(255, 255, 255, 0.75);
  --border-subtle: rgba(15, 23, 42, 0.1);
  --border-glow: rgba(99, 102, 241, 0.2);
  --border-accent: rgba(6, 182, 212, 0.3);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-accent: #0284c7;

  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 16px 36px rgba(15, 23, 42, 0.12);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.15);
  --shadow-cyan-glow: 0 0 20px rgba(6, 182, 212, 0.15);

  --gradient-surface: linear-gradient(180deg, rgba(0, 0, 0, 0.02) 0%, rgba(0, 0, 0, 0.04) 100%);
  --gradient-hero-glow: radial-gradient(circle at 50% 20%, rgba(99, 102, 241, 0.08), transparent 70%);

  color-scheme: light;
}

/* Global Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  transition: background-color var(--transition-base), color var(--transition-base);
}

/* Ambient Background Canvas / Grid Overlay */
.bg-grid-pattern {
  position: fixed;
  inset: 0;
  background-image: 
    radial-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(to right, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 40px 40px, 80px 80px, 80px 80px;
  pointer-events: none;
  z-index: 0;
}

[data-theme="light"] .bg-grid-pattern {
  background-image: 
    radial-gradient(rgba(0, 0, 0, 0.04) 1px, transparent 1px),
    linear-gradient(to right, rgba(0, 0, 0, 0.02) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0, 0, 0, 0.02) 1px, transparent 1px);
}

.bg-ambient-glow {
  position: fixed;
  top: -20%;
  left: 20%;
  width: 60vw;
  height: 60vw;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.12) 0%, rgba(6, 182, 212, 0.06) 40%, transparent 70%);
  pointer-events: none;
  z-index: 0;
  filter: blur(80px);
}

/* Container */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
  z-index: 1;
}

/* Typography Utilities */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  line-height: 1.2;
}

.gradient-text {
  background: var(--gradient-ai);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.gradient-cardano-text {
  background: var(--gradient-cardano);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.gradient-java-text {
  background: var(--gradient-java);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.85rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-subtle);
  background: rgba(255, 255, 255, 0.04);
}

.badge-ai {
  border-color: rgba(6, 182, 212, 0.4);
  background: rgba(6, 182, 212, 0.08);
  color: #38bdf8;
}

.badge-cardano {
  border-color: rgba(42, 115, 255, 0.4);
  background: rgba(42, 115, 255, 0.08);
  color: #60a5fa;
}

.badge-java {
  border-color: rgba(245, 158, 11, 0.4);
  background: rgba(245, 158, 11, 0.08);
  color: #fbbf24;
}

.badge-live {
  border-color: rgba(16, 185, 129, 0.4);
  background: rgba(16, 185, 129, 0.08);
  color: #34d399;
}

.pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--brand-emerald);
  box-shadow: 0 0 10px var(--brand-emerald);
  animation: pulseGlow 2s infinite ease-in-out;
}

@keyframes pulseGlow {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(1.2); }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.75rem 1.6rem;
  font-size: 0.925rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-base);
  border: 1px solid transparent;
  font-family: var(--font-body);
}

.btn-primary {
  background: var(--gradient-ai);
  color: #ffffff;
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(6, 182, 212, 0.45);
}

.btn-secondary {
  background: var(--bg-card);
  border-color: var(--border-subtle);
  color: var(--text-primary);
  backdrop-filter: blur(12px);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--brand-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.btn-sm {
  padding: 0.45rem 1rem;
  font-size: 0.825rem;
  border-radius: var(--radius-sm);
}

/* Header & Nav */
.header {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 100;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: var(--bg-glass);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--transition-base);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-primary);
}

.logo-symbol {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);
  border: 1px solid rgba(99, 102, 241, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 15px rgba(99, 102, 241, 0.3);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  font-family: var(--font-heading);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.brand-est {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-link {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.925rem;
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
  padding: 0.3rem 0;
}

.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-ai);
  transition: width var(--transition-base);
  border-radius: 2px;
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.theme-toggle-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  border-color: var(--brand-primary);
  color: var(--brand-cyan);
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 0.5rem;
}

/* Hero Section */
.hero {
  padding: 5rem 0 4rem;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.hero-heritage-banner {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  background: rgba(99, 102, 241, 0.08);
  border: 1px solid rgba(99, 102, 241, 0.25);
  font-size: 0.8rem;
  color: var(--text-secondary);
  width: fit-content;
}

.hero-title {
  font-size: clamp(2.4rem, 4.5vw, 3.8rem);
  line-height: 1.12;
  font-weight: 800;
  letter-spacing: -0.035em;
}

.hero-description {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 620px;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 0.5rem;
}

.hero-meta-strip {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-subtle);
  margin-top: 1rem;
}

.hero-meta-item {
  display: flex;
  flex-direction: column;
}

.meta-number {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-primary);
}

.meta-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

/* Interactive Hero Terminal / Telemetry Box */
.hero-visual-card {
  position: relative;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(16px);
  overflow: hidden;
  box-shadow: var(--shadow-lg), 0 0 40px rgba(99, 102, 241, 0.15);
  transition: transform var(--transition-base);
}

.hero-visual-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-glow);
}

.terminal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.25rem;
  background: rgba(10, 13, 20, 0.85);
  border-bottom: 1px solid var(--border-subtle);
}

.terminal-dots {
  display: flex;
  gap: 6px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.dot-red { background: #ef4444; }
.dot-yellow { background: #f59e0b; }
.dot-green { background: #10b981; }

.terminal-title {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
}

.terminal-live-badge {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.7rem;
  font-family: var(--font-mono);
  color: var(--brand-emerald);
}

.hero-img-backdrop {
  width: 100%;
  height: 180px;
  object-fit: cover;
  opacity: 0.75;
  filter: brightness(0.9) contrast(1.1);
  display: block;
}

.terminal-body {
  padding: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  background: rgba(10, 13, 20, 0.95);
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.log-line {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  line-height: 1.45;
}

.log-time {
  color: var(--text-muted);
}

.log-tag {
  font-weight: 700;
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  font-size: 0.7rem;
}

.tag-java { background: rgba(245, 158, 11, 0.2); color: #fbbf24; }
.tag-cardano { background: rgba(42, 115, 255, 0.2); color: #60a5fa; }
.tag-ai { background: rgba(6, 182, 212, 0.2); color: #38bdf8; }

.log-text {
  color: var(--text-secondary);
}

.log-text strong {
  color: var(--text-primary);
}

.terminal-interactive-status {
  padding: 0.75rem 1.25rem;
  background: rgba(15, 21, 35, 0.9);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.status-metric {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-secondary);
}

.metric-val {
  color: var(--brand-cyan);
  font-weight: 700;
}

/* Trust & Heritage Marquee Strip */
.heritage-strip {
  padding: 2.5rem 0;
  background: var(--bg-secondary);
  border-y: 1px solid var(--border-subtle);
  position: relative;
  overflow: hidden;
}

.strip-heading {
  text-align: center;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  font-weight: 700;
}

.tech-pills-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.85rem;
}

.tech-pill {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 1.15rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.tech-pill:hover {
  border-color: var(--brand-primary);
  color: var(--text-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.tech-icon {
  width: 18px;
  height: 18px;
}

/* Section Common Styling */
.section {
  padding: 6rem 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 4rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.section-kicker {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--brand-cyan);
}

.section-title {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Projects Showcase Section */
.projects-filter-bar {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-bottom: 2.5rem;
}

.filter-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  color: var(--text-primary);
  border-color: var(--brand-primary);
}

.filter-btn.active {
  background: var(--brand-primary);
  border-color: var(--brand-primary);
  color: #ffffff;
  box-shadow: 0 0 15px rgba(99, 102, 241, 0.4);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 2rem;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  position: relative;
  transition: all var(--transition-base);
  backdrop-filter: blur(12px);
}

.project-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-accent);
  box-shadow: var(--shadow-lg), 0 0 25px rgba(6, 182, 212, 0.15);
}

.project-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.project-icon-box {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.25);
  color: var(--brand-cyan);
}

.project-icon-box.cardano-accent {
  background: rgba(42, 115, 255, 0.1);
  border-color: rgba(42, 115, 255, 0.25);
  color: #60a5fa;
}

.project-icon-box.java-accent {
  background: rgba(245, 158, 11, 0.1);
  border-color: rgba(245, 158, 11, 0.25);
  color: #fbbf24;
}

.project-title-group {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.project-name {
  font-size: 1.35rem;
  font-weight: 700;
}

.project-role-tag {
  font-size: 0.78rem;
  color: var(--brand-cyan);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.project-description {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

.project-benchmarks {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0.75rem;
  background: rgba(0, 0, 0, 0.2);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.benchmark-item {
  color: var(--text-secondary);
}

.benchmark-item strong {
  color: var(--text-primary);
}

.project-tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: auto;
}

.tag-pill {
  padding: 0.25rem 0.65rem;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.project-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-subtle);
  margin-top: 0.5rem;
}

.btn-card-action {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--brand-cyan);
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  transition: gap var(--transition-fast);
}

.btn-card-action:hover {
  gap: 0.6rem;
  color: #ffffff;
}

/* Interactive AI Playground */
.playground-section {
  background: var(--bg-secondary);
  border-y: 1px solid var(--border-subtle);
}

.playground-shell {
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.playground-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  background: rgba(15, 21, 35, 0.8);
  border-bottom: 1px solid var(--border-subtle);
  flex-wrap: wrap;
  gap: 1rem;
}

.playground-mode-tabs {
  display: flex;
  gap: 0.5rem;
}

.mode-tab {
  padding: 0.45rem 1rem;
  font-size: 0.825rem;
  font-weight: 600;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.mode-tab.active {
  background: var(--brand-primary);
  color: #fff;
  border-color: var(--brand-primary);
}

.playground-config-row {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--text-secondary);
}

.config-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.config-slider {
  accent-color: var(--brand-cyan);
  width: 90px;
}

.playground-workspace {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 380px;
}

@media (max-width: 900px) {
  .playground-workspace {
    grid-template-columns: 1fr;
  }
}

.playground-input-col {
  padding: 1.5rem;
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.preset-prompts-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  font-weight: 700;
}

.preset-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.preset-btn {
  font-size: 0.75rem;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: left;
}

.preset-btn:hover {
  background: rgba(99, 102, 241, 0.1);
  border-color: var(--brand-primary);
  color: var(--text-primary);
}

.prompt-textarea {
  width: 100%;
  flex: 1;
  min-height: 140px;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 1rem;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  resize: vertical;
}

.prompt-textarea:focus {
  outline: none;
  border-color: var(--brand-cyan);
  box-shadow: 0 0 10px rgba(6, 182, 212, 0.2);
}

.playground-output-col {
  padding: 1.5rem;
  background: rgba(10, 13, 20, 0.6);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.output-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.output-label {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  text-transform: uppercase;
}

.output-metrics-badge {
  display: flex;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--brand-cyan);
}

.output-content-area {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--text-primary);
  white-space: pre-wrap;
  overflow-y: auto;
  max-height: 280px;
  padding: 0.5rem 0;
}

.typing-cursor {
  display: inline-block;
  width: 8px;
  height: 15px;
  background: var(--brand-cyan);
  margin-left: 4px;
  animation: blink 0.8s infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* 2016-2026 Heritage & Evolution Timeline */
.timeline-section {
  position: relative;
}

.timeline-container {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 0;
}

.timeline-line {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background: linear-gradient(180deg, rgba(245, 158, 11, 0.6) 0%, rgba(42, 115, 255, 0.6) 40%, rgba(6, 182, 212, 0.9) 100%);
  transform: translateX(-50%);
}

@media (max-width: 768px) {
  .timeline-line {
    left: 24px;
  }
}

.timeline-milestone {
  position: relative;
  margin-bottom: 3.5rem;
  display: flex;
  align-items: center;
}

.timeline-milestone:last-child {
  margin-bottom: 0;
}

.timeline-node {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 3px solid var(--brand-primary);
  z-index: 2;
  box-shadow: 0 0 15px var(--brand-primary);
}

.milestone-cardano .timeline-node {
  border-color: #2a73ff;
  box-shadow: 0 0 15px #2a73ff;
}

.milestone-java .timeline-node {
  border-color: #f59e0b;
  box-shadow: 0 0 15px #f59e0b;
}

.milestone-ai .timeline-node {
  border-color: var(--brand-cyan);
  box-shadow: 0 0 20px var(--brand-cyan);
}

.timeline-content-box {
  width: 44%;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  backdrop-filter: blur(12px);
  transition: all var(--transition-base);
}

.timeline-content-box:hover {
  transform: translateY(-3px);
  border-color: var(--border-accent);
}

.milestone-left .timeline-content-box {
  margin-right: auto;
  text-align: right;
}

.milestone-right .timeline-content-box {
  margin-left: auto;
  text-align: left;
}

@media (max-width: 768px) {
  .timeline-node {
    left: 24px;
  }
  .timeline-content-box {
    width: calc(100% - 64px);
    margin-left: 64px !important;
    text-align: left !important;
  }
}

.timeline-year {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 0.25rem;
}

.timeline-heading {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
}

.timeline-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Core Engineering Pillars */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.75rem;
}

.pillar-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.25rem 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  position: relative;
  transition: all var(--transition-base);
}

.pillar-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.pillar-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
}

.pillar-title {
  font-size: 1.2rem;
  font-weight: 700;
}

.pillar-desc {
  font-size: 0.925rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.pillar-highlights {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.pillar-highlights li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.pillar-highlights li::before {
  content: '→';
  color: var(--brand-cyan);
  font-weight: 800;
}

/* Contact / Consultation Section */
.contact-section {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
}

.contact-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 3.5rem;
  box-shadow: var(--shadow-lg);
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 3.5rem;
}

@media (max-width: 900px) {
  .contact-card {
    grid-template-columns: 1fr;
    padding: 2rem;
  }
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-input, .form-select, .form-textarea {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  font-size: 0.9rem;
  color: var(--text-primary);
  font-family: var(--font-body);
  transition: all var(--transition-fast);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--brand-cyan);
  box-shadow: 0 0 12px rgba(6, 182, 212, 0.25);
}

.form-textarea {
  min-height: 110px;
  resize: vertical;
}

.form-feedback {
  padding: 0.85rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  display: none;
}

.form-feedback.success {
  display: block;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.4);
  color: #34d399;
}

/* Footer */
.footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-subtle);
  padding: 4rem 0 2rem;
  font-size: 0.875rem;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

@media (max-width: 900px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

@media (max-width: 580px) {
  .footer-top {
    grid-template-columns: 1fr;
  }
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-bio {
  color: var(--text-muted);
  max-width: 320px;
  line-height: 1.6;
}

.footer-col-title {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-link {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--brand-cyan);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 2rem;
  border-top: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 0.8rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.system-status-indicator {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  color: var(--brand-emerald);
}

/* Modal Dialog for Project Deep Dive */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.modal-overlay.open {
  display: flex;
}

.modal-dialog {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 680px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg), 0 0 30px rgba(99, 102, 241, 0.2);
  position: relative;
  padding: 2.25rem;
}

.modal-close-btn {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all var(--transition-fast);
}

.modal-close-btn:hover {
  background: var(--bg-card);
  color: var(--text-primary);
}

/* Responsive adjustments */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .nav-links {
    display: none;
  }
  .mobile-menu-toggle {
    display: block;
  }
}

.mobile-nav-drawer {
  display: none;
  flex-direction: column;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-subtle);
  padding: 1.5rem;
  gap: 1rem;
}

.mobile-nav-drawer.open {
  display: flex;
}